From my experience, the means the network you are on blocks Tor - you can try bridges (obs4 is recommended) Otherwise, it could be a man in the middle attack Try removing Tor and reinstall. How to do that varies on platform. This probably won't help, but you never know
– linuxandriaFeb 15 '19 at 18:58

1 Answer
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In your log, Tor said that it cannot setup a secure connection using TLS (Transport Layer security), which it's using for making Tor secure. If thats the case, you can try to avoid it by using bridges. Tor project website provides a great explanation on how bridges work and how to use them.

Your system clock is off sync.

Sometimes, Tor can't properly work if your system clock is off sync. You can find instructions online for your OS, just google someting along the lines of How to synchronize time on *Insert the name of the OS you are using*.

Some program on your PC blocks Tor connection

While it's unlikely to happen, you may have a program that blocks Tor from working properly. For example, an antivirus. It was disscussed on Tor StackExchange already: Tor browser conflicts with Malwarebytes antimalware. Try to disable your antivirus and try again.